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Smooth muscle can contract to shorter lengths than skeletal muscles.
Macrophages
A type of white blood cell that engulfs and digests cellular debris, foreign substances, microbes, and cancer cells in a process called phagocytosis.
Lymph Nodes
Small, bean-shaped structures that produce and store cells that help fight infection and disease.
Bacteria
Microscopic, single-celled organisms found in diverse environments, capable of causing disease or contributing to health.
White Pulp
Part of the spleen consisting of lymphatic nodules and diffuse lymphatic tissue; associated with arteries.
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